Dental instrument holder



T. F. BATES.

DENTAL INSTRUMENT HOLDER. ABPLcAToN F lLED AUG- i. 92.

Patented Feb. 7, 1922.

i and from PATENT OFFICE;

THOMAS F. BATES, OF SHEL BYVILLE, TENNESSEE.

DENTAL INSTRUMENT HOLDER.

TO 032 whom 'it may concem:

Be it known that I, THOMAS F. BATES, a citizen of the United States, residing at Shelbyville, in the county of Bedford and State of Tennessee, 'have invented certain new and 'useful Improvements in Dental 'lnstrument Holders; and I do hereby declare the following to be a full, clear, and exact descriptionot the invention, such as will enable others skilled in the art to which it appertains to make and use the Same.

The present invention relates to improvements in dental instrument holders, and has 'for an object to provide a common holder for the great variety of instrumente used by dentists to thereby reduce the expense and the amount of material necessary to the provision of an individual handle on each implement and making the retail cost of implements greatly reduced.

Another object of the invention is to accoinplish the above described purpose by a simple and inexpensive devioe in which the implement tseli will be held most securely against likelihood of rotation in the holder being accidentally dislodged therefrom.

With the foregoing and other objects in View, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the draivingswherein like symbols rei fer to like or corresponding parts throughout the several views,

Fig. 1 is a View in elevation of an improved instrument holder constructed according to the present inventon;

Fig. 2 is a longitudinal sectional View taken through the same; I

Fig. 3 is a similar view with the plunger 'rod and the implement removed;

Fig. 4 is a side view of the plunger rod;

Fig. 75 is a sectional view taken on' the line 5--5 in Fig. 2; v

Fig. 6 is a plan view of the locking pin;

Fig.'7 is an end view thereof; e

Fig. S is an enlarged fragmentary Side view throu'gh'the tip or instrument;

Fig. 9 is an elevational View of a slight modification and Figs. 10 and 11 are elevational views of different inplements to be used in the holders. v

Referring more particularly to the drawings, 1 designates an elongated barrel traversed axially by a bore 2 in which a plunger Specification of Letters Patent,

Patented Feb. 7, 1922.

Application filed August 1, 1921. Serial No. 488334.

rod 3 slidably fits. The lower enlarged pori shoulder is produced between the major portion of the plunger rod 3 and the upper reduced end '7 thereof. A corresponding reduction is made in the bore %which is attended by the formation of a shoulder 8. v At the upper end of the barrel a recess 9 lS made with internal threads to receive the external threads on the lower reduced end 10 of a tip 11 which is provided with a bore 12 in. continuaton of the bore 2 and being of a reduced diameter to agree with the diameter of the upper portion of said bore 2 above the shoulder 8. The tip 11 terminates in an angled extension 13 having also a bore 14: disposecl at an angle to the bore 12 and further having a socket 15 opening through both sides of the tip and being' 80 which is provided with a shoulder 18 adj acent the shank 16 for taking againsttheupper side of the tip 11. The shank 16 is provided with an annular groove 19 for a purpose to be presently described. The bore 14 of the tip 13 extends through the side Wall of the tip and is adapted to receive therethrough the pin 20 having at one end a concave face 21 receivable into the upper coned end 22 of the plunger rod. v

The opposite end of the pin 20 is likewise cut out to a concave form and is provided with a rib 23 which takes into the groove 19 of the tool shank 16.' The side portions' 24 and 25 of the pin 20 embrace the side walls of the shank 16 and firmly hold the 'tool against rotation.

The plunger rod 3 is pre'ferably provided with a knurled head 26 for purposes of manual turning. The device shown in Figs. l. and 2 is for use more particularly on anterior teeth or in anterior parts of the mouth. The device shown in Fig. 9 is used on posterior teeth or for instrumentaton in' the posterior portion of the mouth This implement Figs. 1 and 2 by the provision of an elongated portion 27 differing from the part 13 in its relation to the axis of the tip and the barrel.

In each case it will be understood that' difers from the instrument shown in larger instruments or tool points for heavier work, and maybe used for mechanoal purcourse, first unlocking the device.

The oiroular grooves orconcavtes in the the working point of the implement 17 is disposed in the prolongation of the axis of the barrel to prevent its turning in the hand while using under pressure. The implement Will be found amply strong for the purpose for which itvis intended, yet slender and delioately formed so as to admit of ease in handling. It is of course understood that the annulartio portion may be made of any length orinolination to meet every possible re uirenent.

nuse, the implement 17 is inserted with its shank 16 entering the socket 15 of the tip. "The ,pin 20 is put' through the bore 14: and the plunger 3 inserted through the bore 2 of thebarrel 1. The portion 4: is screwed 'up into the bushing 5, and as this is aooomplished the conioal end 22 will fit within the oonoavity 21-of thelocking pin 20 and cause such pin tobe forced upWardly With its rib 23 entering the groove 19 of the tool shank andalso causing the side po'rtions 24 and 25 of the looking pin to tightly embraoe the sides of the shankj The tool is thus efi'eotively looked in the holderor handle, and it is also prevented from turning therein'.

The removal of the plunger rod 3 is effeoted in the same' Way by rotation reversely through the knob 26. As the plun er rod is withdrawnthe looking rod Wlll. all out of looking engagement with the implement` and the latter may be removed and' another..

implement inserted in'its place. The looking devioe is exceedingly simple, positive and secure 'andis not ao'companied by any spring and Will not be apt to give or release, and the engagement of the looking pin and instrument makes it substantially impossible to pull the latter out of the handle under any strain or vibration without, of

ends of the looking pin are so arranged as to make the pin always seat itself correctly' against the shouldered shank of the tool and m the annular groove made to receive same, Whereby the instrument point is seourely looked in the socket of 'the handle' The handles maybe made heavier and stronger of course, to adapt them' to Carry poses to enter plaoesof difficult access( The improved idevice makes it possible to adjust the implenent about at various angu lar positions for cutting or Working in a different direction While using only one' blade or point, and in this Way a great saving is made -in the handling and cleaning of many instruments. The device also ad- Inits of easy separation andcleaningand sterilization., A great number of instru- `ments may be made With one blade by turning theshouldered instrument point around the entire orcumferenoeof acrcleand looking' it at any point in the circumferenoe by t -htemng the threaded plunger rod, the

blade cutting in a different direction, eaoh 'time it is turned in the sooket of the handle.

Vention-Without departing from the spirit 4 thereot, such changes and modifications being restricted only by the soope of the tolloivingclains. r

lVhat is claimed is:

1. 1\ dental implement holder oomprising i a barrel having a bore therein With a tip having a oommunicating bore and an angled extension having a bore i extending through one side of the tip and. a sooket in the angled extension for reoeiving a tool shank, a looking' pin in' the bore of-the angled extension on said tip adapted to project into the socket, and a looking pin extending through the bore of the handle and the bore of the tip and having e'ngagement With the looking' pin substantially as described? i r :2. A dental and surgioal implement holder comprising a handle portion having a sooketed tip part oarried angularly thereto With oommunicating bores in the handle andtip, lockingpinin the angled tip* extension adapted toextend into the socketed part,

and looking means lying through the handle and tip tor engagenent ith the looking pin, substantially as described.

In oombinationwith atool having 'a i '105 i pin having a ooncave end fitting the groove ot the shank portion, and means tor urging the pin into the groove, substantially as described. i

l. In combination W th a tool having' a shouldered portion and agi'ooved shank 'on an elongated thin handle, a tip portion removably connected therewithand. having an angled extension With a sooket therein to receive the sliank of the tool, a looking pin' inserted throughthe angled extension having a rib in one end toengage thegroove in the tool shank and the portions atthe sides ot the rib tor ongagng the shank to avoid 'turniiig ot the tool, and a looking rrod threaded in the handle and having a, oonioal portion adapted to engage the other endot *thedookng 13113 5211@ pin having a ooncave end engaging the oonioal portion of the rod, substantially as desorbe T oMAs F. BATES. 

